Extension builder estimates (based on hourly rates) to build a single storey extension in St Albans
Range from the cheapest single storey extension £34800 (Apollo Decor Ltd based in AL2) to the dearest single storey extension £50000 (Bob's Home Maintenance based in AL3).
Comparing extension builders estimates for fitting a downstairs toilet gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to build a single storey extension in St Albans by posting a job with HaMuch and we will send it to extension builders in St Albans.
Estimates for common extension builder jobs in St Albans;
| Job | Estimate |
| Underpinning a house | £17393 |
| Build a two storey extension | £87839 |
| Build a timber frame extension | £25893 |
| Install a swimming pool | £80893 |
| Cost to build a single storey extension | £47856 |
| Cost to build a side return extension | £36294 |
| Install an RSJ | £2093 |
| Build an outbuilding | £9893 |
| Build a mansard loft conversion | £51893 |
| Cost of a loft conversion | £32745 |
| Build a kitchen extension | £41893 |
| Build a hip to gable loft conversion | £41893 |
| Build a granny annexe | £86893 |
| Build a garden office | £9893 |
| Convert a garage | £15893 |
| Build a flat roof extension | £21893 |
| Build a dormer loft conversion | £41893 |
| Lay a concrete foundation | £6143 |
| Convert a bungalow loft | £28893 |
| Basement conversion cost | £36294 |